The teacher suggested the dictionary at once.
Not only ________ interested in football but ______ beginning to show an interest in it.
We ________ such great achievements without your efforts. Thanks a lot.
A study ________ in the USA in 1977 showed that the chemical ASA in aspirin could prevent a stroke.
It’s obvious that the Beijing Olympic Gamesa great success. A.kept B.showed C proved D.remained
Scientists ____ thousands of chemicals before they decided on the right one in the end.